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This presentation will cover recent research on nutrient inputs, agricultural management and nitrate concentrations in soil solution and groundwater in the southern Willamette Basin’s Groundwater Management Area (GWMA). Non-point sources are the predominant inputs of n...

Along urban streams and rivers, various processes, including road salt application, sewage leaks, and weathering of the built environment, contribute to novel chemical cocktails made up of metals, salts, nutrients, and organic matter. Due to heterogeneous land use and a myriad of...

“Ecosystem services” are the benefits ecosystems provide to people. These benefits include providing food, clean air, clean water, recreation, and many other services that provide explicit or intrinsic values to people and communities. Investments in Chesapeake Bay re...

Edge-of-field management practices designed to reduce nutrient pollution in waterways may support or alter critical habitat and ecosystem services in and around agricultural systems. Information on both target and non-target effects is needed to support management decisions as la...

Should biosolids be contaminated with an intentional malicious release or natural outbreak of Bacillus anthracis spores, a water resource recovery facility (WRRF) may need to consider if their treatment processes can sufficiently inactivate this pathogen. Three methods commonly e...

Historically, communities have used gray infrastructure—systems of gutters, pipes, and tunnels—to move stormwater away from where we live to treatment plants or straight to local water bodies.  The gray infrastructure in many areas is aging, popula...

Legionella pneumophila is a persistent opportunistic pathogen that poses a significant threat to domestic water systems. Previous studies suggest that copper (Cu) is an effective antimicrobial in water systems. A rapid and sensitive quantification method is desired to optimize th...

The effort with FY19 funding was for further experimentation and refinement of a numerical model with benzene, in support of contamination resulting for California wildfires. This year's request (and corresponding change in FY) is aimed at unstudied organics. This work is also pa...

A random walk particle tracking approach was developed to analyze the advection and dispersion processes of the solute transport in a circular pipe. Stochastic difference equations were derived to model a solute particle’s two-dimensional random movement in the cross-section of a...

Extensive research in recent years has reported higher per- and polyfluoroalkyl substance (PFAS) concentrations in municipal solid waste (MSW) landfill leachate than other municipal wastewaters, including multiple studies of leachate from MSW landfills in the United States. Becau...

With increasing concerns about freshwater cyanobacteria blooms, there is a need to identify which waterbodies are at risk for developing these blooms, especially those that produce cyanotoxins. To address this concern, we developed spatial statistical models using the US National...

This presentation will review the latest research on inputs, budgets, effects, legacies and management related to non-point source nutrient pollution.  Using examples of nitrogen and phosphorus budgets at the national, regional and local scales, Jana Compton from EPA’s...

Wetland restoration and construction are important land management options for retaining nitrogen and phosphorus and thereby improving water quality at local scales (i.e., at nearby streams). However, limited information exists regarding the cumulative influence of wetlands outsi...

Agricultural best management practices/conservation practices (ag BMPs/ACPs) have been widely implemented for nonpoint source pollution control. However, through a Region 10 R2P2 project, we have identified two critical knowledge gaps that limit broader adoption of ACPs in the Pa...

For decades, researchers have sought to document injustices, highlight activism, and identify pathways in moving toward environmental justice (EJ). EJ research regarding water has been predominantly focused on drinking water. This project sought to identify and analyze the breadt...

This is a public presentation on the potential effects of nutrients in smoke on downwind cyanobacteria blooms. Wildfire activity is increasing in the continental U.S. and can be linked to climate change effects, including rising temperatures and more frequent drought conditions. ...

While SWMM has arguably played a pivotal role in pollution control in collection systems since its introduction, traditional applications using the model have been relatively static. They typically involve calibrating and validating SWMM models with data collected and curated for...

Protein processing operations include animal slaughtering, meat and poultry product production, and/or rendering of byproducts. These facilities utilize large volumes of water for hair/hide/feather removal, carcass washing, chilling, trimming and cutting, cooking, and cleaning/sa...

Poster presentation to the PFAS Research Workshop "Science for a Changing World", hosted by Office of Research and Development (ORD) Office of the Science Advisor, Policy, and Engagement (OSAPE) and Center for Environmental Solutions and Emergency Response (CESER) ...

Bench top and pilot lead corrosion studies are gaining more interest, considering revisions and upcoming improvements to the Lead and Copper Rule. This literature review identified studies ranging from simpler month(s)-long bench top dump-and-fill stagnant water tests (coupon tes...

Modeling Water Age in Premise Plumbing Systems

Onsite non-potable water systems (ONWS) collect and treat local source waters for non-potable end uses such as toilet flushing and irrigation. Quantitative microbial risk assessment (QMRA) has been used to set pathogen log10-reduction targets (LRTs) for ONWS to achieve the risk b...

With the declining tailpipe emissions from the US and worldwide motor vehicle fleet, impacts of tire and brake wear are an increasingly important area of interest.  Recent research has shown the compound 6PPD used in tires as an anti-degradation chemical reacts with ozone to...

Anthropogenic disturbances have increased the frequency, area, and intensity of eutrophic events in coastal ecosystems, harming seagrass and macrofauna. The Pawcatuck River and Little Narragansett Bay (CT/RI) is a small, shallow estuary with zones of hypoxia due to algal growth. ...

Seagrass meadows and oyster beds are important coastal systems that provide many benefits. When these habitats are located near each other, benefits may include improved water quality and increased carbon storage. In two RI salt ponds, habitat zones sampled included eelgrass beds...